77177216 has 16 divisors (see below), whose sum is σ = 153751740. Its totient is φ = 38588544.

The previous prime is 77177201. The next prime is 77177249. The reversal of 77177216 is 61277177.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 77177216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301346 + ... + 301601.

Almost surely, 2^77177216 is an apocalyptic number.

It is an amenable number.

77177216 is a deficient number, since it is larger than the sum of its proper divisors (76574524).

77177216 is an equidigital number, since it uses as much as digits as its factorization.

77177216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602961 (or 602949 counting only the distinct ones).

The product of its digits is 28812, while the sum is 38.

The square root of 77177216 is about 8785.0564027785. The cubic root of 77177216 is about 425.7582146805.

The spelling of 77177216 in words is "seventy-seven million, one hundred seventy-seven thousand, two hundred sixteen".